$$\text{Glucose} + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{energy}$$

Question 1

Which analogy best describes the role of mRNA in the cell, according to the 'cookbook terms' analogy?

Accepted Answer

mRNA is like a photocopy of the recipe used to make the dish.

Question 2

Which process occurs in mitochondria and is essential for producing ATP in eukaryotic cells?

Accepted Answer

Energy processing using O$$_2$$ and glucose to make ATP, producing H$$_2O $$and CO$$_2 as by-$$products.

Question 3

Chloroplasts are responsible for which of the following chemical reactions?

Accepted Answer

Solar energy + CO$$_2 + H$_2O$$ $$\rightarrow$$ glucose + O$$_2$$

Question 4

Both mitochondria and chloroplasts have their own DNA. What is the significance of this feature?

Accepted Answer

It allows them to replicate independently of the cell's nuclear DNA.

Question 5

According to Lynn Margulis's endosymbiont theory, what is the origin of mitochondria and chloroplasts?

Accepted Answer

They originated from free-living bacteria that entered into mutualism with eukaryotic cells.

Question 6

Which of the following statements about early Earth is correct?

Accepted Answer

Only bacteria and archaea existed, and most life was heterotrophic.

Question 7

If a mutation prevented the nuclear DNA from producing certain proteins, what would be the likely effect on mitochondria and chloroplasts?

Accepted Answer

They would be unable to function properly, since they rely on nuclear DNA for some proteins.

Question 8

Which equation correctly represents the process of cellular respiration in mitochondria?

Accepted Answer

$$	ext{Glucose} + 	ext{O}_2 ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{energy}$$

Question 9

Which of the following best describes the relationship between mitochondria and chloroplasts in eukaryotic cells?

Accepted Answer

They are mutually interdependent, with one producing energy and the other producing food.

Question 10

Which analogy from the 'cookbook terms' best describes the function of ribosomes?

Accepted Answer

Ribosomes are like the chef who assembles the ingredients into a finished dish.

Question 11

A scientist discovers a cell that can produce ATP but cannot perform photosynthesis. Which organelle is most likely present?

Accepted Answer

Mitochondrion

Question 12

Which of the following is NOT a product of photosynthesis in chloroplasts?

Accepted Answer

CO$$_2$$

Question 13

Why is the endosymbiont theory important for understanding the evolution of eukaryotic cells?

Accepted Answer

It explains how eukaryotic cells developed complex organelles by engulfing prokaryotes.

Question 14

Which of the following statements is true about the replication of mitochondria and chloroplasts?

Accepted Answer

They can replicate independently of the cell's nuclear DNA.

Question 15

If a cell lacked ribosomes, which process would be directly affected?

Accepted Answer

Synthesis of proteins

Question 16

Which of the following best explains why mitochondria and chloroplasts are considered semi-autonomous organelles?

Accepted Answer

They have their own DNA and can replicate independently, but still rely on nuclear DNA for some proteins.

Question 17

Which of the following is a correct analogy for DNA in the 'cookbook terms'?

Accepted Answer

DNA is the cookbook containing all the recipes.

Question 18

Which of the following would most likely occur if chloroplasts were removed from a plant cell?

Accepted Answer

The cell would be unable to perform photosynthesis and produce glucose.

Question 19

Which of the following is a by-product of cellular respiration in mitochondria?

Accepted Answer

CO$$_2$$

Question 20

Which of the following best describes the mutual interdependence of mitochondria and chloroplasts in plant cells?

Accepted Answer

Chloroplasts produce glucose and O$$_2$$, which mitochondria use to generate ATP and release CO$$_2$$ and H$$_2O.$$

Cell Biology: Key Concepts, Organelles, and Evolutionary Theory

Study Guide - Practice Questions